I used lovely ol' Google to explain what this product is, here is what Google had to say:
"Use to model still or slow-moving water, such as ponds, rivers, lakes and more. Pour directly from the bottle. Realistic Water is self-leveling, water soluble, won't crack and has minimal shrinkage. Surface dries firm and clear in approximately 24 hours, depending on humidity conditions."
The back of the bottle also has directions on how to use it. It's a 16 fl. oz. bottle. When bought, the price was $19.99, asking $5. Never has been opened.